/*******************************************************************************
 * Copyright (c) 2003, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.internal.activities.ws;

import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.activities.*;

/**
 * Provides labels for <code>IActivity</code> objects. They may be passed
 * directly or as <code>String</code> identifiers that are matched against
 * the activity manager.
 * 
 */
public class ActivityLabelProvider extends LabelProvider {

    private IActivityManager activityManager;

    /**
     * Create a new instance of the receiver.
     * 
     * @param activityManager
     */
    public ActivityLabelProvider(IActivityManager activityManager) {
        this.activityManager = activityManager;
    }

    /**
     * @param activity
     * @return
     */
    private String getActivityText(IActivity activity) {
        try {
            return activity.getName();
        } catch (NotDefinedException e) {
            return activity.getId();
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object)
     */
    public Image getImage(Object element) {
        return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.viewers.ILabelProvider#getText(java.lang.Object)
     */
    public String getText(Object element) {
        if (element instanceof String) {
            return getActivityText(activityManager
                    .getActivity((String) element));
        } else if (element instanceof IActivity) {
            return getActivityText((IActivity) element);
        } else {
            throw new IllegalArgumentException();
        }
    }
}
